IEC 60050-191:1990 International electrotechnical vocabulary; chapter 191: dependability and quality of service has been changed from IEC 60271:1974 List of basic terms, definitions and related mathematics for reliability.
IEC 60050-191:1990 International electrotechnical vocabulary; chapter 191: dependability and quality of service has been changed from IEC 60271A:1978 First supplement - Preliminary list of basic terms and definitions for the reliability of electronic equipment and the components (or parts) used therein.
IEC 60050-191:1990 International electrotechnical vocabulary; chapter 191: dependability and quality of service has been changed from IEC 60271B:1983 Second supplement - Preliminary list of basic terms and definitions for the reliability of electronic equipment and the components (or parts) used therein.
IEC 60050-191:1990 International electrotechnical vocabulary; chapter 191: dependability and quality of service has been changed from IEC 60271C:1985 Third supplement - Preliminary list of basic terms and definitions for the reliability of electronic equipment and the components (or parts) used therein.
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